朋友們這次分享的是異步回調不是異步調用哦！

請注意嘍！

功能描述，接口地址，方法名稱以及參數說明，同上篇：.NET(C#)調用webService獲取客戶端IP地址所屬區域(非異步)（一）（LZ比較懶，不想寫太多哦！(⊙０⊙)）

實現代碼如下：

 1 namespace main 2 { 3     class PRogram 4     { 5         public static string Result = string.Empty; 6          7         static void Main(string[] args) 8         { 9           10             Stopwatch sw = Stopwatch.StartNew();11 12             string strIP = "111.13.55.3";//請求的IP地址13 14             Console.WriteLine("===== AsyncInvoke 異步回調開始 =====");15 16             GetCityIpHandler handler = new GetCityIpHandler(GetIp);17 18             ////其核心在于IAsyncResult接口的實現19             IAsyncResult res = handler.BeginInvoke(strIP, new AsyncCallback(GetIpSyn), string.Format("===== 主線程耗時{0}毫秒! =====", sw.ElapsedMilliseconds));20 21             Console.WriteLine("===== 繼續執行其他的事情... =====");22 23             Console.WriteLine("===== AsyncInvoke 異步回調完畢！=====");24 25             sw.Stop();26 27             Console.ReadLine();28 29         }30         public delegate string GetCityIpHandler(string strIp);31         /// <summary>32         /// 同步方法33         /// </summary>34         /// <param name="strIP"></param>35         /// <returns></returns>36         public static string GetIp(string strIp)37         {38             IpAddressSearchWebServiceSoapClient ws = new IpAddressSearchWebServiceSoapClient();39             Stopwatch sw = Stopwatch.StartNew();40             string[] strArea_IP = ws.getCountryCityByIp(strIp);41             sw.Stop();//這里我們進行漫長的調用42             return Result = string.Format("IP歸屬地為{0},查詢耗時為{1}毫秒.", strArea_IP[1], sw.ElapsedMilliseconds);43         }44         /// <summary>45         /// 異步回調方法46         /// </summary>47         /// <param name="result"></param>48         static void GetIpSyn(IAsyncResult result)49         {50             GetCityIpHandler hl = (GetCityIpHandler)((AsyncResult)result).AsyncDelegate;//AsyncResult 繼承自IAsyncResult接口51             Result = hl.EndInvoke(result);52             Console.WriteLine(Result); //打印調用GetIp返回的數據53             object obj = result.AsyncState;54             Console.WriteLine(obj);//打印返回結果：用戶定義的對象，它限定或包含關于異步操作的信息。55         }56     }57 }

測試結果如下：

好了朋友們，得睡了，做個健康的程序員，晚安！^_^